After OES 11x nodes are added to the OES 2 SP3 cluster, the Linux POSIX cluster resources must be mounted on and fail over to only OES 11x nodes.

NSS pool cluster resources can fail over to any node in the mixed-mode OES 2 SP3 and OES 11x cluster.

No storage management functions should be executed while a cluster is in mixed-mode unless you must do so as part of the documented upgrade process. Do not attempt to create, delete, expand, or modify the properties for partitions, pools, or volumes for any shared resources in the cluster.

IMPORTANT:If it is necessary to create, modify, or delete a pool as part of a documented cluster resource upgrade process, you must shut down the OES 11x nodes, create the NSS pool cluster resource on an OES 2 SP3 node, then restart the OES 11x nodes. This allows the OES 11x nodes to see the new configuration. This is critical so that pools are able to migrate, and to prevent possible corruption.

You should not create new LVM volume group cluster resources in a mixed-mode cluster. Wait until after the cluster upgrade is completed.